US2468281A - Valve - Google Patents

Description

April 26, 1949. w, J, wlLDERN 2,468,281

I VALVE Filed April 11, 1945 INVENTOR.

l V////a/r7 M70207 Patented Apr. 26, 1949 our TED STATES PATENT OFFICE VALVE William; J. Wildern, Detroit, Mich., assignor to Detroit Brass & Malleable Vorks, Detroit, Mich, a corporation of in Application April 11, 1945, Serial No. 587,660

phases because'ofthe several operations required such; for-example; as the the reception of; the pin, and the hand work required for the insertion of the pin.

It is the aim of the vide a simple, economical construction capable of get into the seat.

A structure made in accordance with the in- Michiga in the accompanying drawthe several parts The valve member has a stem Ill which may be round in overall cross section and it isv cut provide a D-shape in cross section as illustrated at H for reception of a suitable control handle l2. At an intermediate point in its length thestem vide a Iii-shape cross section stitutes one ofthe stop When the-parts are assembled the taperedplug portion 6 is caused toseat in cap-has a passage l1 through which the stem extends and in: order tohold the plug valve on its seat a coil spring-x210 is employed which surrounds the stem andreactsagainst the tapered plug. and the cap l5.

For controlling and limiting the rotary movements ofzthevalve there isan element 2! which be termed awasher, although it preferably isof open: construction. This washer memberor stop member fits into: the

The bight portion of this of metal shown at 24 Which a facet 26. This washer between the cap I5 and the spring acts directly upon the washer in turn pressing against the cap l5.

This stop structure or washer structure cooperposition.

for the segment l3 of the stem and the the assembly of the body can only be the stop member 30 and a pro ection 3| which fit respectively into notches 32 and 33 in the valve body. The projection 38' and its receiving slot 32 are constructed with desirable dimensions measured circumferentially so as to have a nice operative fit and the projection 3| and its cooperating notch 33 have different dimensions measured circumferentially as indicated in the drawing. While these dimensions may vary, the example illustrated shows the cross dimension of the projection 30 as being /8 of an inch while the cross dimension of the projection 3| is $5 of an inch. Further, the two projections 3|] and 3|, and their cooperating notches, are not in alignment with each other. As illustrated the projection 30 and its notch 32 ates with the D-section parts are so constructed that stop member relative to the and the projection 3| and its notch 33 are offset,

so to speak, at an angle relative to each other. As indicated in the drawing this may be about 5 although this is variable.

By this construction the washer can only be assembled to the valve body in one position. For

example, if the washer be rotated on the axis of the valve through 180 the projection 3| would not enter the slot 32. If the washer be rotated on a transverse horizontal so that it is upside down relative to the position shown in Figs. 2 and 3 the projections 39 and 3| are not reversed in position but are adjacent their cooperating slots. However, the angular displacement causes projection 3| to extend relatively upwardly as Fig. 2 is viewed so that there is a total difference of about between the projection 3| and its notch 33. Thus, the washer cannot be assembled in this Similarly, if the washer be shifted through 180 by turning the same on a transverse vertical axis, as Fig. 2 is viewed, the projection 3| will not enter the notch 32. Accordingly, the only way the washer can be assembled is in its correct position and in this position the stop facets and 26 and the D-shape section It of the valve stem are properly arranged so that manipulation of the valve brings the port I into and out of registry with. the inlet passage in the extension 2.

When the parts are assembled the D-shape section l3 cooperates with the facets 25 and 26 of the segment 24. Preferably, the slot forming D-section has an axial dimension greater than the thickness of the washer. Therefore, considerable latitude is provided as indicated in Fig. 1.

As a result the segment 24 lies within the milled section with adequate clearance. If the valve and valve seat wear in use so that the valve member shifts further into the valve body the clearance 24 is adequate to permit this without contact with the stem. Therefore, there is no tendency to shave off metal parts which may get in between the valve seat and the valve plug.

The two positions are shown in Figs. 2 and 3. It will be noted that the D-section l3 abuts against the facet 2B in one position and abuts against the facet 25 in another position. Thus,

the

movement of the valve member is determined by the positions or the facets 25 and 26 and the structure D-section. As illustrated the D-section i3 is cut substantially on the center line of the stem and the apex of the segment 24 lies substantially on the axis of rotation. The movement of, the valve is confined to substantially and in! one position the valve is off and in the other posi-;v tion the valve is on. l

The manufacturing of the structure is simplifled as practically all operations may be made by machine. The slots 32 and 33 may be milled into the body; the D-formations H and I3 may be formed in the stem by a single milling operation; the stop member 2| may be a stamping. No hand operations are required such, for example, as fitting a pin in a hole in the valve member. The structure is strong and effective although of simple design. The abutments or facets 2'5 and 26 form substantially abutting areas and the metal of the segment is under compression when acting as a stop there being no shearing action as is the case with the pin.

I claim:

A valve structure comprising, a valve body with an internal seat, a valve member having a valve portion disposed in and turnable in said seat, a cap for the body, an operating stem on the valve body projecting through the cap, the stem having a transverse slot therein located within the cap and providing a stem section substantially of D-shape in cross section, a washer-like stop member having a notch therein positioned at the location of the transverse slot or stem, a segmentally shaped projection extending into the slot and providing facets for engagement with the flat side of the D-shaped stein section to limit the rotary movements of the valve member, the valve body having substantially oppositely disposed notches thereln and the stop member having substantially oppositely disposed projections received in said notches, characterized in that the circumferential dimensions of one notch and its cooperating projection are greater than the corresponding dimensions of the other notch and its cooperating projection and further characterized in that the center line through one notch and projection is anguiarly displaced relative to the center line of the other notch and projection.

WILLIAM J. WILDERN.

REFERENCES CITED The following references are of record in the of this patent:

ULTTED STATES PATENTS I

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